A closed system Carnot heat engine uses $0\mathrm{.}05$ kg of $R-134a$ as the working fluid. The thermal efficiency of the cycle is $20\%.$ During the heat addition step, the $R-134a$ is at $70C$ and transforms from saturated liquid to saturated vapor.

Determine the net work output of the heat engine and the low level reservoir temperature.

Answer must equal W$=1\mathrm{.}245$ kJ ; TL$=1\mathrm{.}4$ C